Voltage controlled spin precession

Abstract

A recent experiment reports a non-local spin-signal that shows oscillatory behavior as a function of gate voltage when the contacts are magnetized along the direction of current flow, but not when they are magnetized perpendicular to the current, in agreement with the predictions from a simple theory. In this paper we first present a straightforward extension of this theory to include the angular spectrum of electrons and the extended injecting and detecting contacts. The results are in good agreement with those from a non-equilibrium Green function (NEGF)- based model with contact parameters adjusted to fit the experimental contact conductances. They also describe certain aspects of the experiment fairly well, but other aspects deserve further investigation.

Added an important reference and made some minor changes. (8 pages, 3 figures)

References in corpus (20)

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Cited by in corpus (12)

• Spin dynamics in semiconductors
• Charge and spin dynamics driven by ultrashort extreme broadband pulses: a theory perspective
• Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
• Transmission Line Model for Materials with Spin-Momentum Locking
• Spin rotation by resonant electric field in few-level quantum dots: Floquet dynamics and tunneling
• Electric dipole spin resonance at shallow donors in quantum wires
• Interplay between resonant tunneling and spin precession oscillations in all-electric all-semiconductor spin transistors
• Revisit the spin-FET: Multiple reflections, inelastic scattering, and lateral size effects
• Controlled rotation of electrically injected spins in a non-ballistic spin field-effect transistor
• Seebeck effects in two-dimensional spin transistors
• Non-Equilibrium Green's Function based Circuit Models for Coherent Spin Devices
• Connecting physics to systems with modular spin-circuits